UW HTW

Haystack Lookout, WA, USA

Station Information

Seismic Channels

ENE HHE ENN ENZ HHN HHZ ENE ENN ENZ HHE HHN HHZ

Installed

Jun 01, 1975

ShakeAlert

Contributing

Location

47.804, -121.769

Type

Six Component Broadband/Strong Motion

State

WA

Elevation

2733.07 ft

UW.HTW..ENZ

Map

Recent Earthquakes Detected Using HTW

M1.4 2025-12-12 12:42 10.5 mi S from Sedro Woolley, WA UW.HTW..HHZ

M1.1 2025-12-11 21:29 14.79 mi E from Monroe, WA UW.HTW..HHZ

M1.4 2025-12-10 16:49 11.31 mi SW from Skykomish, WA UW.HTW..HHZ